<template>
	<div :class="{ show: show }" class="header-search">
		<svg-icon class-name="search-icon" icon-class="search" @click.stop="click" />
		<el-select
			ref="headerSearchSelectRef"
			v-model="search"
			:remote-method="querySearch"
			filterable
			default-first-option
			remote
			placeholder="Search"
			class="header-search-select"
			@change="change"
		>
			<el-option v-for="option in options" :key="option.item.path" :value="option.item" :label="option.item.title.join(' > ')" />
		</el-select>
	</div>
</template>

<script setup>
import Fuse from 'fuse.js'
import { getNormalPath } from '@/utils/ruoyi'
import { isHttp } from '@/utils/validate'
import usePermissionStore from '@/store/modules/permission'

const search = ref('')
const options = ref([])
const searchPool = ref([])
const show = ref(false)
const fuse = ref(undefined)
const headerSearchSelectRef = ref(null)
const router = useRouter()
const routes = computed(() => usePermissionStore().routes)

function click() {
	show.value = !show.value
	if (show.value) {
		headerSearchSelectRef.value && headerSearchSelectRef.value.focus()
	}
}
function close() {
	headerSearchSelectRef.value && headerSearchSelectRef.value.blur()
	options.value = []
	show.value = false
}
function change(val) {
	const path = val.path
	if (isHttp(path)) {
		// http(s):// 路径新窗口打开
		const pindex = path.indexOf('http')
		window.open(path.substr(pindex, path.length), '_blank')
	} else {
		router.push(path)
	}

	search.value = ''
	options.value = []
	nextTick(() => {
		show.value = false
	})
}
function initFuse(list) {
	fuse.value = new Fuse(list, {
		shouldSort: true,
		threshold: 0.4,
		location: 0,
		distance: 100,
		minMatchCharLength: 1,
		keys: [
			{
				name: 'title',
				weight: 0.7
			},
			{
				name: 'path',
				weight: 0.3
			}
		]
	})
}
// Filter out the routes that can be displayed in the sidebar
// And generate the internationalized title
function generateRoutes(routes, basePath = '', prefixTitle = []) {
	let res = []

	for (const r of routes) {
		// skip hidden router
		if (r.hidden) {
			continue
		}
		const p = r.path.length > 0 && r.path[0] === '/' ? r.path : '/' + r.path
		const data = {
			path: !isHttp(r.path) ? getNormalPath(basePath + p) : r.path,
			title: [...prefixTitle]
		}

		if (r.meta && r.meta.title) {
			data.title = [...data.title, r.meta.title]

			if (r.redirect !== 'noRedirect') {
				// only push the routes with title
				// special case: need to exclude parent router without redirect
				res.push(data)
			}
		}

		// recursive child routes
		if (r.children) {
			const tempRoutes = generateRoutes(r.children, data.path, data.title)
			if (tempRoutes.length >= 1) {
				res = [...res, ...tempRoutes]
			}
		}
	}
	return res
}
function querySearch(query) {
	if (query !== '') {
		options.value = fuse.value.search(query)
	} else {
		options.value = []
	}
}

onMounted(() => {
	searchPool.value = generateRoutes(routes.value)
})

watchEffect(() => {
	searchPool.value = generateRoutes(routes.value)
})

watch(show, (value) => {
	if (value) {
		document.body.addEventListener('click', close)
	} else {
		document.body.removeEventListener('click', close)
	}
})

watch(searchPool, (list) => {
	initFuse(list)
})
</script>

<style lang="scss" scoped>
.header-search {
	font-size: 0 !important;

	.search-icon {
		cursor: pointer;
		font-size: 18px;
		vertical-align: middle;
	}

	.header-search-select {
		font-size: 18px;
		transition: width 0.2s;
		width: 0;
		overflow: hidden;
		background: transparent;
		border-radius: 0;
		display: inline-block;
		vertical-align: middle;

		:deep(.el-input__inner) {
			border-radius: 0;
			border: 0;
			padding-left: 0;
			padding-right: 0;
			box-shadow: none !important;
			border-bottom: 1px solid #d9d9d9;
			vertical-align: middle;
		}
	}

	&.show {
		.header-search-select {
			width: 210px;
			margin-left: 10px;
		}
	}
}
</style>
